Nihonweld NHF-7200 description: NHF-7200 is predominantly suited for tough and crack resistant joinings and surfacings on parts of high Mn-steel subject to extreme impact, compression and shock. Buildups on C-steel are also possible. The High Mn-content produces a fully austenitic deposit. The deposit is highly workhardening and hardens during service from originally 200-250 HB to 450 HB. Machining is possible with tungstene carbide tools.